基于HHT的泄漏电缆周界入侵信号的检测方法

Research of Detection Method for Leaky Cable Perimeter Intrusion Signals Based on HHT

总结希尔伯特-黄变换(HHT)在泄漏电缆周界入侵信号检测系统中的应用现状。模拟了7种不同的入侵方式,并对入侵信号进行检测、提取和仿真,得到入侵信号的频率-幅值-相位三维谱分布情况,实现对入侵物体速度、强度和范围的检测,满足快速、准确、多信息的信号检测需求。证实HHT能够准确确定周界入侵信号的瞬时特性,可对非线性和非平稳信号进行有效的时频分析,适用于泄漏电缆周界入侵信号检测系统。

Applying Hilbert-Huang Transform （HHT） to the detection system for leaky cable perimeter intru- sion signals was summarized and seven intrusion methods were simulated; through detecting, extracting and simulating the signals, the three-dimensional spectral distribution of intrusion signals＇ frequency- amplitude- phase was reached to implement the detection of speed, strength and scope of the intrusion objects and to satis- fy both rapid and accurate detection of signals. The results show that HHT can accurately determine the instan- taneous feature of perimeter intrusion signals, including effective time-frequency analysis of nonlinear and non- stationary signals. It＇s suitable for detecting leaky cable intrusion signals.